I have an cannondale m200se black mountian bicycle what is it worth and date it was made?

it has shimano acera derailluers and crankset has shimano twistshifters it is a 21 speed bicycle has has the original irc pirahna tires and the original shimano cantilever brakes stx ? other than a couple of tiny scratches the bicycle is a joy to ride i kept it well serviced by the local bike shop i never rode it during cold winters condition is 8.5 out of 9 can anybody help thanks i love my cannondale